<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .one{
            height: 30px;
            background-color: pink;
            border: 1px solid black;
        }
        .one_div1{
            width: 1200px;
            height: 30px;
            border: 1px solid black;
            margin:0 auto;
        }
        .one_div1_1{
            width: 185px;
            height: 30px;
            border: 1px solid black;
            float: left;
        }
        .one_div1_2{
            width: 810px;
            height: 30px;
            border: 1px solid black;
            float: right;
        }
        .two{
            height: 200px;
            background-color: red;
        }
        .two_div1{
            width: 1200px;
            height: 200px;
            background-color: blue;
            margin:0 auto;
        }
        .c{
            width: 1200px;
            height: 500px;
            background-color: brown;
            margin: 0 auto;
        }
        .c div{
            display: inline-block;
        }
        .c1{
            width: 195px;
            height: 500px;
            background-color: chartreuse;
        }
        .c2{
            width: 790px;
            height: 500px;
            background-color: cornflowerblue;
            margin-left: 10px;
        }
        .c3{
            width: 190px;
            height: 500px;
            background-color: darkgreen;
        }
    </style>
</head>
<body>
    <div class="one">
        <div class="one_div1">
            <div class="one_div1_1"></div>
            <div class="one_div1_2"></div>
        </div>
    </div>
    <!-- 京东 -->
    <div class="two">
        <div class="two_div1"></div>
    </div>
    <!-- 菜单 -->
    <div class="c">
        <div class="c1"></div>
        <div class="c2"></div>
        <div class="c3"></div>
    </div>
    <!-- less测试 -->
    <div class="test">
        <div class="test-1">
            <div class="one">
                <div class="c" style="width: 100px;height: 5000px;border: 1px solid black;"></div>
            </div>
        </div>
    </div>
</body>
</html>